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Knapping is the shaping of flint, chert, obsidian, or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration.
Errett Callahan was born in Lynchburg, Virginia, on December 17, 1937.Callahan’s interest in the outdoors and Native American lifeways began quite early on. As a boy Callahan was a member of the Boy Scouts of America and it was as a Boy Scout that he was first exposed to the skills and techniques that the Native Americans used to survive in the outdoors. [1]
The Levallois technique (IPA:) is a name given by archaeologists to a distinctive type of stone knapping developed around 250,000 to 400,000 [1] years ago during the Middle Palaeolithic period. It is part of the Mousterian stone tool industry, and was used by the Neanderthals in Europe and by modern humans in other regions such as the Levant .
Stone tools have been used throughout human history but are most closely associated with prehistoric cultures and in particular those of the Stone Age.Stone tools may be made of either ground stone or knapped stone, the latter fashioned by a craftsman called a flintknapper.
Don E. Crabtree was born in Heyburn, Idaho on June 8, 1912. He finished high school in Twin Falls in 1930, after which he worked for the Idaho Power Company. After a brief period he traveled to California where he enrolled in Long Beach Junior College in the mid-1930s with the intent to major in geology and paleontology.
Kit Paulson (born 1981, in Hinsdale, Illinois) [1] is an American artist known for glass flamework. She attended Alfred University and Southern Illinois University Carbondale . [ 2 ] Paulson completed residencies at Salem State University in Salem, Massachusetts, the Museum of Glass in Tacoma, Washington, and the Penland School of Craft .
The ball tip is a hemisphere with a ground-glass surface on the outside, which fits inside of the socket, where the ground glass surface is on the inside. This type of joint separates freely and must be held together with a clamp. Ball-and-socket joints are labeled with a size code consisting of a number, a slash, and another number.
In the 1790s, the O'Hara and Craig glass works was the first glass works in Pittsburgh, and this works was another early user of coal as a fuel for its furnaces. [67] By 1800, it is thought that roughly ten glass works were operating in the United States. [68] Challenges for American glass works revolved around labor, raw materials, and imports.
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